#include <stdio.h>
int main() {
	char a;
	while (scanf_s("%c", &a) == 1) {
		if (a >= 'a' && a <= 'z' || a >= 'A' && a <= 'Z') {
			printf("%c is an alphabet.\n", a);
		}
		else {
			printf("%c is not an alphabet.\n", a);
		}
		getchar();
		
	}
	
	return 0;
}